Governor for explosive-engines.



P. G. ZUMDAHL. GovEBNoR PoR EXPLosIvB ENGINES.

APILIOATION FILED SEPT. 24, 1910. 16,

2 SHEETS-'SHEET 2.

` P. G. ZUMDAHL. GOVERNOR FOB. EXPLOSIVE ENGINES.

APPLIoATIoN HLED smi'. 24, 1910.

* Patented July 16, 1912.

2 SHEETS- SHEET 1.

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commun p UNTTED STATES PATENT OFFTCE.

FREDERICK C. zUI/IDAHL, OF ROCKFORD, ILLINOIS, AssIGNoR To ROCKFORDENGINE WORKS, F ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

GOVERNOR FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Patented July 16, 1912.

Application led September 24, 1910. Serial No. 583,645.

To all whom it may concern:

Be it known that I, FREDERICK C. ZUM- nAI-IL, a citizen of the UnitedStates, residing at Rockford, -in the county ot llVinnebago and State ofIllinois, have invented certain new and useful Improvements in Governorsfor Explosive-Engines, ot which the following is a specication.Y

The Object of this invention is to provide novel and effective means forautomatically governing the speed of explosive engines.

ln the accompanying drawings, Figure 1 is a view in side elevation,parts being shown in section, which sect-ion is taken on dotted line b oFig. 3. Fig. 2 is a partial rear elevation and section. Fig. 3 is apartial plan view and sect-ion. Fig. 4 is a section on dotted line a aFig. 2. Fig. 5 is a section on dotted line Z) l) Fig. 3 of the governorportion only. A

The engine in the main is ot the usual construction and comprises thebase 1, supporting the crank-shaft 2, to which are connected thefly-wheels 3 and 4. A cylinder 5 is supported by the base, and to it isdetachably connected a head 6, which supports the intake 4and exhaustvalves, also the ignition devices. The exhaust valve has its stem 7surrounded by a coiled spring 8, which serves t-o hold t-he exhaustvalve closed. A

Y bell-crank lever has one arm 9 located beneath the lower end ot theexhaust valvestern, and to the other arm 10 Ot this bellci'ank lever ispivotally connected a rod 13. To the crank-shaft is keyed a spur gear14, and a spur-gear is idly mounted on a stud 16 extending from the baseof the frame. These gears 14 and 15 are in constant mesh, and a Cam 17is connected with the spur-gear 15 to rotate therewith. A rocker arm ispivoted to the base 1 on the stud 1S, and to the free end of the branch19 of this arm is pivoted a roller 2O with which the cam 17 contacts.The other branch 21 of this rocker arm supports a block 22 formed with anotch 23.

To the frame ot the engine is pivoted a bell-crank, to one arm 24 otwhich is secured a detent 25 in an adjustable manner by bolts 2G passingthrough slots 27 in the detent. A screw 28 is supported by t-hebell-crank and contacts with one end of the detent. The other end 29 ot'the detent is beveled and fitted to enter the notch 23. To the other arm30 of this bell-crank is pivoted an arm 31 about midway ot its length,and to one end of this arm is secured a shoe 32, and to the other end otthis arm is connected a screw-threaded rod 33 supporting a nut 34. Thisrod 33 passes through an ear 35 extending from the bell-crank arm 24 andhas a coil spring 36 surrounding it and located between the` ear and theend of the arm 31. Another coil-spring 37 is located between the nut 34and the bell-crank arm 24.

To the inner side of one of the spokes of the fly-wheel 3 is pivoted alever 38 at one end, and its other end has a connection with thefly-wheel through the spring 39, and is adjustable in connect-iontherewith by the screw-threaded rod 40 and nuts 41. This lever 38 has aprojection 42 extending from it and lies within the path ot the shoe 32.As the crank-shaft rotates, the spur-gears 14 and 15 will be rotatedwhich will rotate the cam 17. At each rotation ot the cam 17 it willcontact with the roller 2O and rock the rocker-arm which will pull onthe rod 13 and rock the bell-crank 9-10 thereby raising the exhaustvalve stem 7 against the actie-n of the spring 8. As the ily-wheel3rotates, the arm 38 will be carried with it which will bring theprojection 42 in the path of the shoe 32, and if the {ly-wheel isrotating above normal speed, the projection will not contact with theshoe, owing to centrifugal torce. l/Vhen the fly-wheel is rotating belownormal speed, the vprojection 42 will contact with the shoe 32 whichwill rock the arm 31, and through the spring 36 will rock the detent 25so that 'its beveled end 29 will be held out of the notch 23, which willallow the rocker-arm to move, thereby allowing the spring 8 to close theexhaust valve, but when the projection 42 rotates tree of the shoe 32, aspring 43 will hold the detent 25 in the notch 23, thereby holding theVrocker-arm stationary and hold the exhaust valve Open. lllhile theexhaust valve is being held open, no compression can take place wit-hinthe cylinder, consequently no power will be developed, but when theexhaust valve is closed, compression can take place. By thisarrangement, the exhaust valve is normally ield Open and permitted toclose at the times an explosion is required.

I claim as my invention.

l. ln an internal combustion engine, the combination with an exhaustvalve, of oper- `ating means therefor including a rocker zii-nn meansfor moving the rocker arm, t detel'it Controlling1 ,euch niovenient andConipi'ising a pivoted level', an zii'ni pivoted to the lever, :tyielding Connection between the levell and znni that noi'inally beldeySaid anni in :1 predetermined position, but permits the yieldingmovement ot the infin in both directions iiioin said noi-nml position,and a centrifugal device that operates on the nin to effecttheinoveinent of the detent.

ln an internal eoinbustion engine, the eoinliiinution with en exhaustvulvq of operating ineens therefor includingY a i'oelei aun, ineens formoving the rocker aun, a detent thatl engages the toeliet' infin tocontrol its nioveinenft, Said detentcomprising t pivoteil bell cranklever, one arm of which engages the i'ooliei min, an alni pivotedbetween its ende on the other niin. of the bell crank level', :i springinterposed bet-Ween one end el" the pivoted zu'in and the bell crank, ubolteonneeting said, end ot' the arm and the bell (5l-zink, it nut onthe bolt for moving` the arm against tbe notion of the spring andholding it in different positions, :i Spring intel-posed between the nntand bell crank, und a oentiifngnlly operated device that engages theother end of the pivoted arm.

in testimony whereof l have hereunto setl my hand in presence of twoSubscribing witnesses.

FREDERICK C. ZllhlDAl'lL.

lVitnesSes A. O. BEHEL, E. D. E. N. BEHEL.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents, Washington, D. C.

